Fortress Isles: Sky War is a free-to-play tower defense strategy game developed by IGG.COM for Android. In this game, players take on the role of a Lord who must manage and defend their own floating isle. The game offers a wonderful blend of tower defense, tactics, role-playing, and multiplayer battles.

The game is fast-paced, with 2-minute battles that allow players to jump right into the action. Players can compete against other players from around the world in real-time, multiplayer gameplay. They can also form a party with friends to explore dungeons, hunt for treasures, and defeat powerful bosses. The game also offers sandbox base building, allowing players to unleash their creativity and build an isle with both offense and defense in mind.